My players usually operate as a well oiled machine (referring to my main group, not my newbie group) but they sometimes make suboptimal decisions intentionally. It always seems to result in a lot of fun. It's like adding a dash of spicy peppers to kick the scene up a notch. I'd say that, for us, fun > survival, so if it achieves the goal of being fun it's a win for us, irrespective of whether all the characters survive (though they frequently do).Yes, you are correct. That's why we see so much advice online on how making suboptimal choices on purpose can lead to "interesting" situations in game.
I might be on the minority when I straight up tell my players not to do it unless they are okay with the prospect of quick, gruesome death. I believe the story is more interesting when players try their beast to overcome the challenges laid in front of them. I also don't care about what people call "metagaming".